Estimation of CPT resistance based on DPH results

Abstract

Hungarian experience about the correlation of CPT and DPH results is summarized. A historical review of CPT-DPH and CPT-SPT correlations is presented, and the reliability of the published CPT-DPH correlations is analyzed using recent data from Hungarian geotechnical practice. Based on these data the paper defines soil types where reliable correlation exists and proposes formulas describing the relationships between the CPT and DPH results, because in the case of hard state clays and soils containing gravel an acceptable relationship cannot be stated.

Lagerungsdichte von nichtbindigen Böden aus Ramm‐ und Drucksondierungen

“…Korrelationen zwischen CPT und DPL an einem Standort aus tonigem bis schluffigem Sand werden in entwickelt; eine geringfügige Verbesserung ergibt sich, wenn auch die lokale Mantelreibung einbezogen wird. Beziehungen zwischen CPT und DPH in werden in Abhängigkeit vom mittleren Korndurchmesser angegeben und berücksichtigen a priori den Einfluss des Überlagerungsdrucks. Vergleiche von SPT‐ mit DPSH‐Schlagzahlen für Sande und schluffige Sande sind in angegeben.…”

In-situ measurements in Overconsolidated Clay: Earth Pressure at rest

“…The behaviour of the soils is determined by CPTu which is one of the world-wide best-known in-situ measurements [6] but horizontal earth pressure can be determined in indirect way.…”

Estimation and Separation of Preconsolidation Stress Using Triaxial,- and Oedometer Test in Kiscelli Clay

“…Results, e.g. void ratio,-moisture content,-shear strength,-major stress at failure,-oedometer,-unloading-reloading modulus,-overconsolidation ratio as functions of depth were already analysed previously [3][4][5][6].…”

“…intact Kiscelli Clay) [3], CPT is more applicable to calculate pile bearing capacity with additional in-situ test (e.g. dynamic probing) [4]. In this study, the profiles of the stress history were analysed by triaxial and oedometer test results.…”